Epidemiological studies indicate that regular consumption of three cups of black tea per day reduces the risk of stroke or myocardial infarction. In a number of previous nutrition intervention studies tea has been shown to improve vascular function as assessed by Flow Mediated Dilation (FMD).

Spray dried aqueous extract of a batch of tea extract that has shown to improve FMD previously

Other: Positive control

Positive control

Placebo Comparator: Placebo

Food grade colouring, artificial tea flavour and an amount of caffeine matched to the caffeine in the Black tea extract

Other: Placebo

Placebo

Detailed Description:

The current study tests a specific Black tea extract against a placebo in population that has previously show to be sensitive to the effect of black tea on Flow Mediated dilation. A tea extract that has previously been shown to improve FMD is included as the positive control.

Eligibility

Ages Eligible for Study:

40 Years to 65 Years (Adult)

Genders Eligible for Study:

Male

Accepts Healthy Volunteers:

Yes

Criteria

Inclusion Criteria:

Apparently healthy male volunteers with no history of cardiovascular disease

Having body mass index (BMI) of between 18.0 and 30.0 kg/m2 (inclusive)

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For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01945970